Shade-mounting.



E. w. HOLST & e. WRIGHT.

SHADE MOUNTING.

APPLICATION FILED MAY 28. l9l4- RENEWED APR- 8, I918.

Patented Juno 2", 1918.

2 7 Z M F Ali F Fig.5.

fNI/LYVTURS ENELEHARDJ' Mil /0.552.

EILEERT WEEK BY THEIR ATTUHNEX fwlf - ZZZ UNITED STATES PATEN T OFFICE.

ENGELHARIDT W. HOLST, OF BOSTON, MASSACHUSETTS, AND GILBERT WRIGHT, OF SCHENECTADY, NEW YORK, ASSIGNORS TO GENERAL ELECTRIC COMPANY, A.

CORPORATION OF NEW YORK.

SHADE-MOUNTING.

Specification of Letters Patent.

Patented June 25, 1918.

Application filed May 28, 1914, Serial No. 8 1,683. Renewed April 8, 1918. Serial No. 227,374.

To all whom it may concern Be it known that we, ENGELHARDT W. HoLsr, a citizen of the United States, residing at Boston, county of Suffolk, State of Massachusetts, and GILBERT WRIGHT, a citi zen of the United States, residing at Schenectady, county of Schenectady, State of New York, have invented certain new and useful Improvements in Shade-Mountings, of which the following is a specification.

Our invention relates to shade mounting and the like, and it is concerned with the mounting of reflectors, shades, globes and other inclosures used with incandescent electric lamps or other light sources. It is our aim to make the mounting simple, strong, secure, convenient and reliable, and generally to improve and cheapen the devices employed. Other advantages obtainable in connection with the invention include ease and quickness in securing the shades in position and in removing them for cleaning or for any outher purpose; durability and good appearance in service; looseness and absence of vibration even under the worst conditions of service; and the possibility of discovering by quick inspection whethershades are properly secured or not. These features espeeially adapt our mounting for use on street cars, where shades and reflectors must be frequently removed and cleaned by persons who are unskilled and usually rather careless, and where the safety of passengers imperatively requires that the shades should be properly replaced and secured. It will be understood, however, that its utility is not restricted to this field.

In carrying out our invention, we prefer to employ telescoping parts of which one is associated with the lamp or its socket and the other with the shade or reflector or its holder. With one of these telescoping parts we associate a rotatable member which 1n conjunction with other means normally serves to prevent separation of the parts: this it may do directly, byits own engage ment with means embodied in or associated with the other parts, or indirectly, by preventing relative rotary or longitudinal movement of the parts necessary to the disengagement of mutually corresponding engagement means associated with them and adapted when engaged to prevent separation. In either case, greater convenience in manipulation may be secured by arranging that relative rotation of the telescoping parts themselves when together shall be revented or limited by mutually correspon ing engagement means whose disengagement will be prevented by the collar until the parts are ready to be separated. We have herein illustrated and described a particular construction embodying all these features that is the best for our purpose at present known to us; but while our invention extends even to specific details and combinations and arrangements of parts herein shown, yet it is not confined thereto, but can be carried out and applied in other ways.

In the accompanying drawings, Figure 1 is a side view illustrating a shade mounting constructed in accordance with our invention, the lower portion of the shade being broken away.

Fig. 2 is a similar view with the parts in mid-section.

Fig. 3 is a view generally similar to Fig. 2, but with the device turned 90 to the right from its position in that figure, with certain parts not in section, and with one of the parts displaced preparatory to the removal of the shade.

Referring first to Figs. 1 and 2, it will be seen that the one of the telescoping parts above mentioned that is associated with the lamp is a shcet-metal shell 1 whose upper portion is expanded to provide conveniently for its attachment to a ceiling or the like by means of screws extending through holes 2 therein. This shell 1 is adapted to inclose any preferred or approved socket means (not shown) for an incandescent electric lamp (also not shown). The glass shade or reflector 3 is shown as having its neck por; tion 4: of the form usual in such articles. The telescoping part associated with the shade 3 is shown as a sleeve 5 whose upper portion is of such external diameter as to pass the smallest part of the shade neck 4, but whoselower end 6 is flared or expanded so as to fit inside the shade neck where it begins to expand downward. The upper portion of the sleeve part 5 is externally threaded, and on it is screwed an internally threaded collar member 7 which serves to secure the shade 3 firmly in place, the lower end of projections 11 (three being the intended said member 7 being as shown expanded so as to fit snugly over the neck 4 of the shade. The parts 5 and 7 together form a shade holder which can be quickly and easily at- I tac'hed to the shade and as readily removed, but which when once attached will never really need to be removed until the shade is broken, changed, or discarded. In the present instance, the sleeve part 5 is the outer one of the telescoping parts and fits around the shell part 1 freely, but not too loosely. The member 8 which prevents separation of the parts 5 and 1 as above set forth has the form of a ring or collar 8 whose upper portion is internally threaded at 9 so that it may be screwed on said part 5 and whose plain lower portion is enlarged at the shoulder 10 sufiiciently for it to overlap the upper edge of the part 7.

Referring, now, to Figs. 2 and 3, it will be seen that the engagement means of the shell part 1 comprise a plurality of external number in the device shown) consisting of studs riveted in its cylindrical wall. These projections 11 are of a length exceeding the sist relative turning of the parts 1 and 5.

When the sleeve part 5 is first put in place on the shell part 1, the studs 11 lie in the up-- per notches 13 as shown inFig. 3 and support said part 5 and the shade 3; but when thelocking ring member 8 is allowed to drop from its position in that figure and screwed on the part 5 by turning it to the left till it can be turned no farther, it lifts said part 5 till the studs 11 are jammed tight between the shoulder 10 of said collar member 8 and thebottoms of the notches 14.. Under these conditions, the parts are held tight and firm without any looseness or play, and it is impossible to move the sleeve part 5 lengthwise on the part 1 far enough to be able to turn it thereon so as to get the studs 11 opposite the openings of the bayonet slots. At the same time the collar member 8 covers the threaded portion of the sleeve part 5 as well as the studs. By merely taking hold of the shade 3 and attempting to shake it one can instantly tell whether the collar member 8 is properly screwed fast; and even if this is omitted, one can see at a glance by the position of the collar 8 with reference to the part 7 whether the collar has been screwed on the fixed axial position sleeve part 5 far enough to at least prevent the removal or accidental dropping ofi' of said part 5.

It will be observed that all the parts have simple forms and can be produced by simple spinning, pressing, punching, and threading operations, so that the manufacture of the device can be made easy, rapid, and inexpensive.

What we claim as new and desire to secure by Letters Patent of the United States, is,-

1. A lamp shade mounting comprising telescoping parts one associated with the lamp and the other with the shade, said parts having mutually corresponding engagement means adapted, when engaged, to limit relative turning of the parts and requiring for their disengagement relative longitudinal movement of said parts and a rotatable collar threaded on one of said parts adapted to engage with the other to prevent V such relative movement thereof.

2. A lamp shade mounting comprising telescoping parts one associated with the lamp and the other with the shade, said parts having mutually corresponding engagement means adapted, when engaged, to limit relative turning of the parts and requiring for their disengagement relative turning andlongitudinal movement of said parts, and a rotatable collar associated with and engaging said parts so as normally to prevent such relative movement thereof.

3. A lamp shade mounting comprising telescoping parts one associated with the lamp and the other with the shade, said parts having mutually corresponding en- I gagement means adapted, when engaged, to

prevent sufficient relative longitudinal movement of the parts for the removal of one from the other and requiring for their disengagement a preliminary relative longitu dinal movement of the parts and a subsequent relative turning thereof, and a rotatable collar associated with one of said parts which normally engages the other so as to prevent even the preliminary longitudinal movement aforesaid.

4. A lamp shade mounting comprising a part associated with the lamp having externally projecting engagement means, an externally threaded sleeve associated with the shade and adapted to fit about the part aforesaid, and a collar threaded on said sleeve adapted to engage said projecting engagement means and hold the sleeve in a with reference to the aforesaid part. i

5. A lamp shade mounting comprising a part associated with the lamp, an externally threaded sleeve associated with the shade and adapted to fit about the part aforesaid, said sleeve having bayonet slots and said part associated with the lamp havin projections adapted to engage therein, an a collar 5 part associated with the lamp and having external projections, a sleeve having an expanding lower end adapted to fit within a shade and having an externally threaded upper portion adapted to fit about said part associated with the lamp, said upper portion having bayonet slots therein for receiving and engaging the aforesaid projections, a collar threaded on said sleeve for securing the shade thereon, and another collar also threaded on said sleeve adapted to be screwed down over and against said projections so as to conceal them and also lock said sleeve securely on said part associated with the lamp.

In witness whereof I, ENGELHARDT W. 20 HOLST, have hereunto set my hand this 20th day of May 1914-, and I, GILBERT WRIGHT, have hereunto set my hand this 27th day of May, 1914.

ENGELHARDT W. HOLST. GILBERT WRIGHT. Witnesses to Holst:

HOWARD R. SARGENT, E. J. HAINEs'. Witnesses to WVright:

L. MAY VVIIITTAKER, HELEN ORFORD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

